:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --sidebar-width: 250px;
    --navbar-height: 56px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 420px;
}

.login-box h1 {
    color: #333;
    font-weight: 600;
}

.wrapper {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: #2c3e50;
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 999;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.sidebar.active {
    margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-header {
    padding: 1.5rem;
    background: #1a252f;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h3 {
    font-size: 1.25rem;
    margin: 0;
    font-weight: 600;
}

.sidebar ul.components {
    flex: 1;
    padding: 1rem 0;
}

.sidebar ul li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar ul li a {
    padding: 1rem 1.5rem;
    font-size: 1rem;
    display: flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar ul li a i {
    margin-right: 10px;
    font-size: 1.2rem;
}

.sidebar ul li a:hover,
.sidebar ul li.active a {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

#content {
    width: 100%;
    min-height: 100vh;
    transition: all 0.3s;
    margin-left: var(--sidebar-width);
}

#content.active {
    margin-left: 0;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

#sidebarCollapse {
    border: none;
}

.container-fluid {
    padding: 2rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.stat-card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.stat-card .card-body {
    padding: 1.5rem;
}

.stat-icon {
    font-size: 3rem;
    opacity: 0.3;
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 1.5rem;
}

.card-header {
    background: white;
    border-bottom: 1px solid #e9ecef;
    padding: 1rem 1.5rem;
    border-radius: 10px 10px 0 0 !important;
}

.card-title {
    font-weight: 600;
    color: #333;
}

.avatar-sm {
    width: 40px;
    height: 40px;
    font-size: 1rem;
    font-weight: 600;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: #495057;
    background: #f8f9fa;
}

.table tbody tr {
    transition: background-color 0.3s;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

.badge {
    padding: 0.35em 0.65em;
    font-weight: 500;
}

@media (max-width: 768px) {
    .sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }

    .sidebar.active {
        margin-left: 0;
    }

    #content {
        margin-left: 0;
    }

    .container-fluid {
        padding: 1rem;
    }

    .stat-card {
        margin-bottom: 1rem;
    }
}

.alert {
    border-radius: 10px;
    border: none;
}

.btn {
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-weight: 500;
    transition: all 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.form-control {
    border-radius: 8px;
    border: 1px solid #ced4da;
    padding: 0.6rem 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

.input-group-text {
    border-radius: 8px 0 0 8px;
}